Titanium and its alloys have many excellent properties, which are mainly embodied in the following aspects:

1. High strength. Titanium alloy has high strength, its tensile strength is 686 - 1176 MPa, and its density is only about 60% of steel, so its specific strength is very high.

2. High hardness. The hardness HRC of titanium alloy (as annealed) is 32-38.

3. Low modulus of elasticity. The elastic modulus of titanium alloy (as annealed) is 1.078*10-1.176*10MPa, which is about half of that of steel and stainless steel.

4. Excellent performance at high and low temperatures. At high temperature, titanium alloy can still maintain good mechanical properties, its heat resistance is much higher than that of aluminium alloy, and its working temperature range is wider. At present, the working temperature of new type of heat-resistant titanium alloy can reach 550-600 degrees C. At low temperature, the strength of titanium alloy is higher than that at normal temperature, and it has good toughness. Low temperature titanium alloy has -25 degrees C. It also maintains good toughness at 3 C.

5. Titanium has strong corrosion resistance. Titanium can form thin and compact titanium oxide film on the surface of Titanium in air below 550 C. Therefore, its corrosion resistance is better than that of most stainless steels in oxidizing media such as atmosphere, sea water, nitric acid and sulfuric acid and strong alkali.